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This commit is contained in:
parrt 2016-12-09 09:49:56 -08:00
parent 337adffa03
commit 661c87b47c
1 changed files with 8 additions and 2 deletions
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10
runtime/Java/src/org/antlr/v4/runtime/atn/ATN.java
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@ -138,8 +138,14 @@ public class ATN {
* {@link RuleStopState} of the outermost context without matching any
* symbols, {@link Token#EOF} is added to the returned set.
*
* <p>If {@code context} is {@code null}, it is treated as
* {@link ParserRuleContext#EMPTY}.</p>
* <p>If {@code context} is {@code null}, it is treated as {@link ParserRuleContext#EMPTY}.</p>
*
* Note that this does NOT give you the set of all tokens that could
* appear at a given token position. This function always computes
* what token(s) can come next specific to a single context (call stack),
* which is what you want for error reporting and recovery. Getting
* all *possible* tokens given a partial input stream is a separate
* computation. See https://github.com/antlr/antlr4/issues/1428
*
* @param stateNumber the ATN state number
* @param context the full parse context